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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 166 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.276 − 19 =
  2. 2.486 − 46 =
  3. 3.135 − 46 =
  4. 4.492 − 86 =
  5. 5.113 − 36 =
  6. 6.244 − 36 =
  7. 7.557 − 19 =
  8. 8.477 − 17 =
  9. 9.254 − 56 =
  10. 10.186 − 78 =
  11. 11.425 − 99 =
  12. 12.191 − 89 =
  13. 13.88 − 26 =
  14. 14.500 − 26 =
  15. 15.206 − 17 =
  16. 16.220 − 76 =
  17. 17.273 − 87 =
  18. 18.190 − 87 =
  19. 19.266 − 27 =
  20. 20.328 − 19 =
  21. 21.370 − 86 =
  22. 22.373 − 99 =
  23. 23.241 − 99 =
  24. 24.259 − 59 =
  25. 25.130 − 76 =
  26. 26.556 − 77 =
  27. 27.105 − 16 =
  28. 28.299 − 67 =
  29. 29.165 − 77 =
  30. 30.108 − 56 =
  31. 31.126 − 17 =
  32. 32.583 − 48 =
  33. 33.567 − 18 =
  34. 34.119 − 48 =
  35. 35.78 − 66 =
  36. 36.536 − 97 =
  37. 37.65 − 36 =
  38. 38.418 − 29 =
  39. 39.289 − 17 =
  40. 40.576 − 68 =

Answer key

  1. 257
  2. 440
  3. 89
  4. 406
  5. 77
  6. 208
  7. 538
  8. 460
  9. 198
  10. 108
  11. 326
  12. 102
  13. 62
  14. 474
  15. 189
  16. 144
  17. 186
  18. 103
  19. 239
  20. 309
  21. 284
  22. 274
  23. 142
  24. 200
  25. 54
  26. 479
  27. 89
  28. 232
  29. 88
  30. 52
  31. 109
  32. 535
  33. 549
  34. 71
  35. 12
  36. 439
  37. 29
  38. 389
  39. 272
  40. 508

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